Question

Which substances exhibit only London forces ?? He,H2O,HCl, Cl2

Answer 1

I think it will be He, and Cl2

Answer 2

Answer: He and Cl2

Step-by-step explanation:

London forces are displayed by substances that are nonpolar such as gas molecules and nonpolar covalent bonds. H2O and HCl all contain polar covalent bonds. Hydrogen is bonded to a highly electronegative atom hence these substances exhibit hydrogen bond.Cl2 is nonpolar, same applies to He. Cl2 is a formed by a homonuclear covalent bond hence both He and Cl2 contain only London forces.